package com.songsong.myblog2.shiro;

import at.pollux.thymeleaf.shiro.dialect.ShiroDialect;
import com.songsong.myblog2.shiro.MyShiroRealm;
import com.songsong.myblog2.shiro.RetryLimitCredentialsMatcher;
import org.apache.shiro.authc.credential.CredentialsMatcher;
import org.apache.shiro.cache.ehcache.EhCacheManager;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;

//配置文件注解
@Configuration
public class ShiroConfig {
    @Bean
    public ShiroFilterFactoryBean shirFilter(SecurityManager securityManager) {
        System.out.println("ShiroConfiguration.shirFilter()");
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean.setSecurityManager(securityManager);
        //拦截器.
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();
        // 配置不会被拦截的链接 顺序判断
        filterChainDefinitionMap.put("/css/**", "anon");
        filterChainDefinitionMap.put("/emoji/**", "anon");
        filterChainDefinitionMap.put("/images/**", "anon");
        filterChainDefinitionMap.put("/img/**", "anon");
        filterChainDefinitionMap.put("/js/**", "anon");
        filterChainDefinitionMap.put("/languages/**", "anon");
        filterChainDefinitionMap.put("/lib/**", "anon");
        filterChainDefinitionMap.put("/love/**", "anon");
        filterChainDefinitionMap.put("/music/**", "anon");
        filterChainDefinitionMap.put("/plugins/**", "anon");
        filterChainDefinitionMap.put("/", "anon");
        filterChainDefinitionMap.put("/findArticle/**", "anon");
        filterChainDefinitionMap.put("/toregister", "anon");//到注册界面
        filterChainDefinitionMap.put("/getCode", "anon");//获取验证码
        filterChainDefinitionMap.put("/main/toFriendlyLink", "anon");//到友链页面
        filterChainDefinitionMap.put("/main/toAboutMe", "anon");//到关于我页面
        filterChainDefinitionMap.put("/register", "anon");//注册请求
        filterChainDefinitionMap.put("/main", "anon");
        filterChainDefinitionMap.put("/main/**", "anon");//main网页中的所有请求
        filterChainDefinitionMap.put("/archives/**", "anon");//归档页面的所有请求
        filterChainDefinitionMap.put("/categories/**", "anon");//分类页面的所有请求
        //未授权界面;
        shiroFilterFactoryBean.setUnauthorizedUrl("/anon/403");
        //配置退出 过滤器,其中的具体的退出代码Shiro已经替我们实现了
        filterChainDefinitionMap.put("/logout", "logout");
        //<!-- 过滤链定义，从上向下顺序执行，一般将/**放在最为下边 -->:这是一个坑呢，一不小心代码就不好使了;
        //<!-- authc:所有url都必须认证通过才可以访问; anon:所有url都都可以匿名访问-->
        filterChainDefinitionMap.put("/**", "authc");
        // 如果不设置默认会自动寻找Web工程根目录下的"/login.jsp"页面
        shiroFilterFactoryBean.setLoginUrl("/login");
        // 登录成功后要跳转的链接
        shiroFilterFactoryBean.setSuccessUrl("/index");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactoryBean;
    }

    /**
     * 凭证匹配器
     * （由于我们的密码校验交给Shiro的SimpleAuthenticationInfo进行处理了
     * ）
     *
     * @return
     */
   /* @Bean
    public HashedCredentialsMatcher hashedCredentialsMatcher(){
        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        hashedCredentialsMatcher.setHashAlgorithmName("md5");//散列算法:这里使用MD5算法;
        hashedCredentialsMatcher.setHashIterations(2);//散列的次数，比如散列两次，相当于 md5(md5(""));
        return hashedCredentialsMatcher;
    }*/
    @Bean
    public MyShiroRealm myShiroRealm() {
        MyShiroRealm myShiroRealm = new MyShiroRealm();
        myShiroRealm.setCredentialsMatcher(retryLimitCredentialsMatcher());
        return myShiroRealm;
    }


    @Bean
    public SecurityManager securityManager() {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        securityManager.setRealm(myShiroRealm());
        return securityManager;
    }

    /**
     * 开启shiro aop注解支持.
     * 使用代理方式;所以需要开启代码支持;
     *
     * @param securityManager
     * @return
     */
    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }

    @Bean(name = "simpleMappingExceptionResolver")
    public SimpleMappingExceptionResolver
    createSimpleMappingExceptionResolver() {
        SimpleMappingExceptionResolver r = new SimpleMappingExceptionResolver();
        Properties mappings = new Properties();
        mappings.setProperty("DatabaseException", "databaseError");//数据库异常处理
        mappings.setProperty("UnauthorizedException", "403");
        r.setExceptionMappings(mappings);  // None by default
        r.setDefaultErrorView("error");    // No default
        r.setExceptionAttribute("ex");     // Default is "exception"
        //r.setWarnLogCategory("example.MvcLogger");     // No default
        return r;
    }

    @Bean
    @ConditionalOnMissingBean
    public DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator defaultAAP = new DefaultAdvisorAutoProxyCreator();
        defaultAAP.setProxyTargetClass(true);
        return defaultAAP;
    }

    @Bean
    public EhCacheManager ehCacheManager() {
        EhCacheManager ehCacheManager = new EhCacheManager();
        ehCacheManager.setCacheManagerConfigFile("classpath:config/ehcache.xml");
        return ehCacheManager;
    }

    @Bean
    public CredentialsMatcher retryLimitCredentialsMatcher() {
        RetryLimitCredentialsMatcher retryLimitCredentialsMatcher = new RetryLimitCredentialsMatcher(this.ehCacheManager());
        retryLimitCredentialsMatcher.setHashAlgorithmName("md5");
        retryLimitCredentialsMatcher.setHashIterations(2);
        retryLimitCredentialsMatcher.setStoredCredentialsHexEncoded(true);
        return retryLimitCredentialsMatcher;
    }

    @Bean
    public ShiroDialect shiroDialect() {
        return new ShiroDialect();
    }
}